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Definition Logical fallacies are flaws in reasoning that lead to faulty, illogical statements. They are unreasonable argumentative tactics named for what has gone wrong during the reasoning process.

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Most logical fallacies masquerade as reasonable statements, but they are in fact attempts to manipulate readers by reaching their emotions instead of their intellects.

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Ad Hominem Latin for to the man Directly attacks someone’s appearance, personal habits, or character rather than focusing on the merit of the issue at hand. The implication is that if something is wrong with this person, whatever he/she says must be wrong. How can you say he’s a good musician when he’s been in and out of rehab for three years?

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Ad Hominem – Making it Personal Sara is divorced, so whatever relationship advice she gives you can’t be good. It is the suggestions, not the person who makes them that deserve attention. Sara’s marital status has nothing to do with the quality of her advice. Isn’t it also possible that Sara could be married and give awful advice? If my husband forgot to wash his dish, I would move out too. You did the right thing, Carol.

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Hasty Generalization A hasty generalization is a conclusion based on insufficient or unrepresentative evidence. Stereotyping and Sexism are forms of this fallacy. Take, for example common dumb blonde jokes: Q: What do you call a blonde skeleton in the closet? A: Last year's hide-and-go-seek winner.

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Example of a Generalization The only redheads I know are rude. Therefore, all redheads must have bad manners. If the speaker only knows two redheads, then he has insufficient evidence to make the general claim about all people with that hair color.

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Either – Or / False Dilemma A false dilemma asserts that a complex situation can have only two possible outcomes and that one of the options is necessary or preferable. Either go to college or forget about making money. This falsely implies that a college education is a pre-requisite for financial success. Was it her college education that made Britney tons of money?

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Begging the Question This is a kind of circular argument where the support only restates the claim. Wrestling is dangerous because it is unsafe. Jogging is fun because it is enjoyable. Unsafe means the same thing as dangerous and fun means the same thing as enjoyable. This makes the reasoning circular.

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Post Hoc Fallacy  Short for post hoc, ergo propter hoc, which means after this, therefore caused by this. This fallacy assumes that just because B happened after A, it must have been caused by A. Politicians love this one.

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Post Hoc Example Since Governor Bush took office, unemployment of minorities in the state has decreased by seven percent. Governor Bush should be applauded for reducing unemployment among minorities. Before we pat the governor on the back, the speaker must show that Bush’s policies are responsible for the decrease in unemployment. It is not enough to show the decrease came after his election.

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False Analogy Example If we can put a man on the moon, why can’t we find the cure for the common cold? While both things being compared here are related to science, there are more differences than similarities between space and biological advancements.